CVE-2025-66036 is a cross-site scripting (XSS) vulnerability identified in the Anjaliavv51 Retro platform, a web-based service specializing in vintage collection items. The flaw exists in versions prior to 2.4.7 and stems from improper neutralization of input during web page generation, classified under CWE-79. This vulnerability allows an attacker to inject malicious scripts into web pages viewed by other users. The attack vector is network-based (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R), such as clicking a malicious link or submitting crafted input. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component. The impact affects confidentiality and integrity at a low level (C:L, I:L), with no impact on availability (A:N). Exploitation could lead to theft of session cookies, user impersonation, or manipulation of displayed content, potentially facilitating further attacks like phishing or privilege escalation. Although no exploits are currently known in the wild, the vulnerability is significant enough to warrant prompt remediation. The vendor patched the issue in version 2.4.7, addressing the input validation and output encoding flaws. The vulnerability is particularly relevant for organizations relying on Retro for e-commerce or community engagement, where user trust and data integrity are critical.

For European organizations, the impact of CVE-2025-66036 includes potential compromise of user session data and unauthorized manipulation of web content, which can erode customer trust and lead to reputational damage. Confidentiality breaches could expose personal data or authentication tokens, increasing the risk of account takeover. Integrity impacts may allow attackers to alter displayed information, facilitating phishing or fraud. Although availability is not affected, the indirect consequences of successful exploitation could disrupt business operations through loss of customer confidence or regulatory scrutiny under GDPR. Organizations in sectors such as e-commerce, cultural heritage, and vintage collectibles are particularly vulnerable due to their reliance on the Retro platform for customer interaction and transactions. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often weaponize such vulnerabilities once disclosed. Failure to patch could also lead to compliance issues with European data protection regulations.

European organizations using the Retro platform should immediately upgrade to version 2.4.7 or later to apply the official patch addressing this XSS vulnerability. Beyond patching, implement strict input validation on all user-supplied data, employing whitelisting approaches where feasible. Apply context-aware output encoding to neutralize any residual malicious input before rendering in HTML, JavaScript, or other contexts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. Conduct regular security testing, including automated scanning and manual code reviews focused on input handling components. Educate users about the risks of clicking suspicious links and implement multi-factor authentication to mitigate session hijacking risks. Monitor web application logs for unusual input patterns or error messages indicative of attempted exploitation. Finally, ensure compliance with GDPR by documenting vulnerability management processes and breach response plans.